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- Columbia UniversityUS5 papers
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- Brera Astronomical ObservatoryIT3 papers
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- DePaul UniversityUS3 papers
- Goddard Space Flight CenterUS3 papers
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4 papers · 1 filter
Thermal Formaldehyde Emission in NGC7538 IRS1
Onic I. Shuvo, E. D. Araya, W. S. Tan +4
Spectral lines from formaldehyde (H2CO) molecules at cm wavelengths are typically detected in absorption and trace a broad range of environments, from diffuse gas to giant molecula…
Long-term Variability of HCO Masers in Star-forming Regions
N. Andreev, E. D. Araya, I. M. Hoffman +5
We present results of a multi-epoch monitoring program on variability of 6cm formaldehyde (HCO) masers in the massive star forming region NGC7538IRS1 from 2008…
The Last of FIRST: The Final Catalog and Source Identifications
David J. Helfand, Richard L. White, Robert H. Becker
The FIRST survey, begun over twenty years ago, provides the definitive high-resolution map of the radio sky. This VLA survey reaches a 20cm detection sensitivity of 1 mJy over 10,5…
Variable Radio Sources in the Galactic Plane
Robert H. Becker, David J. Helfand, Richard L. White +1
Using three epochs of VLA observations of the Galactic Plane in the first quadrant taken ~15 years apart, we have conducted a search for a population of variable Galactic radio emi…